ABAP Select data from SAP table ICACORRESPNCHIST into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP ICACORRESPNCHIST table and store it within an internal table, including using the newer @DATA inline declaration methods. It also shows you various ways to process this data using ABAP work area, inline declaration or field symbols including executing all the relevant CONVERSION_EXIT routines specific to ICACORRESPNCHIST. See here for more generic Select statement tips.

Sometimes data within SAP is stored within the database table in a different format to what it is displayed to the user. These input/output conversation FM routines are what translates the data between the two formats.

There is also a full declaration of the ICACORRESPNCHIST table where each field has a char/string type for you to simply copy and paste. This allows you to use processing that is only available to these field types such as the CONCATENATE statement.

DATA: IT_ICACORRESPNCHIST TYPE STANDARD TABLE OF ICACORRESPNCHIST,
      WA_ICACORRESPNCHIST TYPE ICACORRESPNCHIST,
      GD_STR TYPE STRING.

DATA: lo_typedescr type REF TO cl_abap_typedescr.
DATA: lv_fieldname type fieldname.

FIELD-SYMBOLS: <FIELD> TYPE any.
FIELD-SYMBOLS: <ICACORRESPNCHIST> TYPE ICACORRESPNCHIST.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_ICACORRESPNCHIST.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM ICACORRESPNCHIST
  INTO TABLE IT_ICACORRESPNCHIST.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM ICACORRESPNCHIST
*  INTO TABLE @DATA(IT_ICACORRESPNCHIST2).
*--Further methods of using ABAP code to  select data from SAP database tables

*You can also declare the header/work area using the in-line DATA declaration method
READ TABLE IT_ICACORRESPNCHIST INDEX 1 INTO DATA(WA_ICACORRESPNCHIST2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_ICACORRESPNCHIST ASSIGNING <ICACORRESPNCHIST>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<ICACORRESPNCHIST>-MANDT = 1.
<ICACORRESPNCHIST>-CACORRESPONDENCETYPE = 1.
<ICACORRESPNCHIST>-CONTRACTACCOUNT = 1.
<ICACORRESPNCHIST>-BUSINESSPARTNER = 1.
<ICACORRESPNCHIST>-CACORRESPONDENCE = 1.

ENDLOOP.

LOOP AT IT_ICACORRESPNCHIST INTO WA_ICACORRESPNCHIST.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_ICACORRESPNCHIST-CACONTRACT, sy-vline,
  WA_ICACORRESPNCHIST-COMPANYCODE, sy-vline,
  WA_ICACORRESPNCHIST-CREATIONDATE, sy-vline,
  WA_ICACORRESPNCHIST-CORRESPONDENCEPRINTDATE, sy-vline,
  WA_ICACORRESPNCHIST-CORRESPONDENCEISSUEDATE, sy-vline,
  WA_ICACORRESPNCHIST-CORRESPONDENCEISSUETIME, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_ICACORRESPNCHIST you want to display...

  WRITE:/ sy-uline.
* Aternatively use generic code to Write field values (and NAME) to screen report
  DO.
    ASSIGN COMPONENT sy-index OF STRUCTURE wa_ICACORRESPNCHIST TO <field>.
    IF sy-subrc <> 0. EXIT. ENDIF.
    WRITE:/ 'Field Value', <field>, sy-vline.
    gd_str = <field> .
    lo_typedescr ?= CL_ABAP_DATADESCR=>DESCRIBE_BY_DATA( <field> ).
    lv_fieldname = lo_typedescr->GET_RELATIVE_NAME( ).
    WRITE:/ 'Field Name', lv_fieldname.
  ENDDO.

  
*Redo loop but convert all fields from internal to out value  
LOOP AT IT_ICACORRESPNCHIST INTO WA_ICACORRESPNCHIST.


*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Convert all fields to display/output versions using conversion routines
  PERFORM convert_all_field_values CHANGING wa_EKKO.
	 
ENDLOOP.

  
*&---------------------------------------------------------------------*
*& Form convert_all_field_values
*&---------------------------------------------------------------------*
FORM convert_all_field_values CHANGING p_EKKO LIKE wa_EKKO.
DATA: ld_input(1000) TYPE c, ld_output(1000) TYPE C.

*Conversion exit ALPHA, internal->external for field CONTRACTACCOUNT
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_ICACORRESPNCHIST-CONTRACTACCOUNT
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_ICACORRESPNCHIST-CONTRACTACCOUNT.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field BUSINESSPARTNER
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_ICACORRESPNCHIST-BUSINESSPARTNER
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_ICACORRESPNCHIST-BUSINESSPARTNER.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field CACONTRACT
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_ICACORRESPNCHIST-CACONTRACT
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_ICACORRESPNCHIST-CACONTRACT.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field ORIGLCORRESPONDENCERECIPIENT
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_ICACORRESPNCHIST-ORIGLCORRESPONDENCERECIPIENT
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_ICACORRESPNCHIST-ORIGLCORRESPONDENCERECIPIENT.
WRITE:/ 'New Value:', ld_input.

*Conversion exit GJAHR, internal->external for field CORRESPONDENCECREATIONYEAR
CALL FUNCTION 'CONVERSION_EXIT_GJAHR_OUTPUT'
  EXPORTING
    input =                      WA_ICACORRESPNCHIST-CORRESPONDENCECREATIONYEAR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_ICACORRESPNCHIST-CORRESPONDENCECREATIONYEAR.
WRITE:/ 'New Value:', ld_input.
ENDFORM. 

*&---------------------------------------------------------------------*
*& Form process_as_string_field_values
*&---------------------------------------------------------------------*
FORM process_as_string_field_values CHANGING p_EKKO LIKE wa_EKKO.

TYPES: BEGIN OF T_ICACORRESPNCHIST_STR, 
MANDT TYPE STRING,
CACORRESPONDENCETYPE TYPE STRING,
CONTRACTACCOUNT TYPE STRING,
BUSINESSPARTNER TYPE STRING,
CACORRESPONDENCE TYPE STRING,
CACONTRACT TYPE STRING,
COMPANYCODE TYPE STRING,
CREATIONDATE TYPE STRING,
CORRESPONDENCEPRINTDATE TYPE STRING,
CORRESPONDENCEISSUEDATE TYPE STRING,
CORRESPONDENCEISSUETIME TYPE STRING,
CURRENCY TYPE STRING,
CAAMOUNTINLOCALCURRENCY TYPE STRING,
CACORRESPONDENCESTATUS TYPE STRING,
INBOUNDCORRESPNCDUEDATE TYPE STRING,
INBOUNDCORRESPNCRECEIVEDDATE TYPE STRING,
BUSINESSPARTNERUUID TYPE STRING,
ORIGLCORRESPONDENCERECIPIENT TYPE STRING,
ORIGLCORRESPNCRECIPIENTUUID TYPE STRING,
CREATIONDATETIME TYPE STRING,
CORRESPONDENCEISSUEDATETIME TYPE STRING,
CORRESPONDENCEISSUEDBYUSER TYPE STRING,
CORRESPONDENCEPRINTDATETIME TYPE STRING,
CORRESPONDENCEPRINTEDBYUSER TYPE STRING,
CORRESPONDENCECREATIONYEAR TYPE STRING,
CACORRESPONDENCERECURRENCE TYPE STRING,
CACORRESPONDENCERECURRENCEPERD TYPE STRING,
CORRESPONDENCEISEMPTY TYPE STRING,
TRANSFERPOSTGHASBEENCARRIEDOUT TYPE STRING,
CAPRINTRUNDATE TYPE STRING,
CAPRINTRUNID TYPE STRING,
CASUBAPPLICATION TYPE STRING,
CORRESPONDENCEISTEST TYPE STRING,
CATECHCORRESPONDENCESTATUS TYPE STRING,
APPLICATIONFORM TYPE STRING,
RAWDATAINTERFACEAPPLFORM TYPE STRING,
CACORRESPNCDISPATCHCONTROL TYPE STRING,END OF T_EKKO_STR.
DATA: WA_ICACORRESPNCHIST_STR type T_EKKO_STR.

DATA: ld_text TYPE string.

LOOP AT IT_EKKO INTO WA_EKKO.
  MOVE-CORRESPONDING wa_EKKO TO WA_EKKO_STR.
  CONCATENATE: sy-vline
WA_ICACORRESPNCHIST_STR-MANDT sy-vline 
WA_ICACORRESPNCHIST_STR-CACORRESPONDENCETYPE sy-vline 
WA_ICACORRESPNCHIST_STR-CONTRACTACCOUNT sy-vline 
WA_ICACORRESPNCHIST_STR-BUSINESSPARTNER sy-vline 
WA_ICACORRESPNCHIST_STR-CACORRESPONDENCE sy-vline 
WA_ICACORRESPNCHIST_STR-CACONTRACT sy-vline 
WA_ICACORRESPNCHIST_STR-COMPANYCODE sy-vline 
WA_ICACORRESPNCHIST_STR-CREATIONDATE sy-vline 
WA_ICACORRESPNCHIST_STR-CORRESPONDENCEPRINTDATE sy-vline 
WA_ICACORRESPNCHIST_STR-CORRESPONDENCEISSUEDATE sy-vline 
WA_ICACORRESPNCHIST_STR-CORRESPONDENCEISSUETIME sy-vline 
WA_ICACORRESPNCHIST_STR-CURRENCY sy-vline 
WA_ICACORRESPNCHIST_STR-CAAMOUNTINLOCALCURRENCY sy-vline 
WA_ICACORRESPNCHIST_STR-CACORRESPONDENCESTATUS sy-vline 
WA_ICACORRESPNCHIST_STR-INBOUNDCORRESPNCDUEDATE sy-vline 
WA_ICACORRESPNCHIST_STR-INBOUNDCORRESPNCRECEIVEDDATE sy-vline 
WA_ICACORRESPNCHIST_STR-BUSINESSPARTNERUUID sy-vline 
WA_ICACORRESPNCHIST_STR-ORIGLCORRESPONDENCERECIPIENT sy-vline 
WA_ICACORRESPNCHIST_STR-ORIGLCORRESPNCRECIPIENTUUID sy-vline 
WA_ICACORRESPNCHIST_STR-CREATIONDATETIME sy-vline 
WA_ICACORRESPNCHIST_STR-CORRESPONDENCEISSUEDATETIME sy-vline 
WA_ICACORRESPNCHIST_STR-CORRESPONDENCEISSUEDBYUSER sy-vline 
WA_ICACORRESPNCHIST_STR-CORRESPONDENCEPRINTDATETIME sy-vline 
WA_ICACORRESPNCHIST_STR-CORRESPONDENCEPRINTEDBYUSER sy-vline 
WA_ICACORRESPNCHIST_STR-CORRESPONDENCECREATIONYEAR sy-vline 
WA_ICACORRESPNCHIST_STR-CACORRESPONDENCERECURRENCE sy-vline 
WA_ICACORRESPNCHIST_STR-CACORRESPONDENCERECURRENCEPERD sy-vline 
WA_ICACORRESPNCHIST_STR-CORRESPONDENCEISEMPTY sy-vline 
WA_ICACORRESPNCHIST_STR-TRANSFERPOSTGHASBEENCARRIEDOUT sy-vline 
WA_ICACORRESPNCHIST_STR-CAPRINTRUNDATE sy-vline 
WA_ICACORRESPNCHIST_STR-CAPRINTRUNID sy-vline 
WA_ICACORRESPNCHIST_STR-CASUBAPPLICATION sy-vline 
WA_ICACORRESPNCHIST_STR-CORRESPONDENCEISTEST sy-vline 
WA_ICACORRESPNCHIST_STR-CATECHCORRESPONDENCESTATUS sy-vline 
WA_ICACORRESPNCHIST_STR-APPLICATIONFORM sy-vline 
WA_ICACORRESPNCHIST_STR-RAWDATAINTERFACEAPPLFORM sy-vline 
WA_ICACORRESPNCHIST_STR-CACORRESPNCDISPATCHCONTROL sy-vline      INTO ld_text SEPARATED BY SPACE.

*Add any further fields from structure WA_EKKO_STR you want to CONCATENATE...
ENDLOOP.
ENDFORM.